Heney splitdoef



(No Model.)

` H. SPLITDORF.

INSULATBD WIRE.

No. 383,919. Patented June 5, 1888.

WITH/8858: Zyl/708% ATTORNEYS.

UNITED STATES HENRY SPLITDGRF, OF

NEWT YORK, N. Y., ASSIGNR TO THE SPLITDORF WIRE COMPANY, F SAME PLAGE.

lNSULATl WiRE.,

SPECIFICATION forming part of Letters Patent NTo, 383,919, dated June 5, 1888.

Application [lied Novrmber 1:2, lSSI.

T0 @ZZ whom 1/my concern:

Be it known that i, vHENRY SPLTTDORE, residing` in the city, county, and State of New York, have invented an Improved Insulated lVire, of which the fellowingis a specification,

reference being had to the accompanying d rawings, forming` part of this specifica-tien, in Which- Figurel represents a side view of a portion io of an insulated wire embodying my improvements, and Fig. 2 is a cross section thereof.

The object of my invention is to provide a wire for electrical and other purposes with a non-combustible insulation.

I5 ln carrying out my invention l wind asbes tus bers a around the wire A to be insulated. The asbestus fibers have first been made into a cord or thread. These fibers are very short and .great care must be taken that they be not 2^, separated. in applying,` this asbestus to the wire l untu'ist the iibers when in the thread form and spreuland flatten them into a thin layer when -winding on the wire, as shown in Fig. 1. By applying;v the fibers in a thin spreadout layer, as described, the insulated Wire will be of much smaller diameter than if wound with the asbestus fibers inthe ordinary thread form, and therefore Will not take up as much space when wou ud on cores, die., as said thread-covered wires do.

i do not confine myself to applying the asbestus fibers when in the thread i'orrn, as the iibers maybe applied in a thin-spread layer when in other forms. I prefer to apply the asbestus fibers by means of the machine patented by me and described in Letters Fatent No. 300,403, Llune 17, 18S-i, and also by the machine for which I have made application for Letters Patent, Serial No. 256,972, tiled 40 December 5, 1887. By these machines the thread of asbestus fibers is untwisted and the bers spread out in a thin layer, which lies ciosel y around the Wire.

Serial No. 255,018. (No model.)

ln Fig. 1 ofthe drawings have shown the fibers a of asbestus as being in two sepa rate thin-spread and iiattened threads, but one or more than two such untwisted spread and fiattencd threadsmay be wrapped around the Wire, as preferred.

This asbestus-covered vfire will be found of 5o great use, especially in dynamo-machines and in other electrical apparatus. Often the Wires in electrical apparatus are burned out7 and the instruments destroyed from various causes, but principally' because when au increased current passes through the wire the insulation used heretofore was instan tl y consu med. When the insulation was thus burned ot'f, the Wire would be left exposed, and therefore useless. XVith this asbestuseovcred Wire, if a current of increased strength passes through the wire, the insulation-wire will remain unaffected, because the asbestus covering` cannot be burned off. lf desired, the Wire may be coated with gum before the asbestus is applied, and then the whole heated to cause the fibers to adhere more firmly to the wire, as described in Letters Patent No. 171,185, December 14, 1875, or as shown in Letters Patent No. 239,070, March 22, 188i., both of which Were granted 7o to me.

This asbestus insulation will not crack when the Wire is bent.

By Wire I niean plain Wire or any other metallic conductor.

Having` now described rny invention, what I claim is A wire for electrical and other purposes covered with asbestus iibers applied in the forni of an untwistcd spread and flattened thread, substantially as herein shown and described.

HENRY SPLITDORF. Vituessesz C. SIELEY,

M. Tuna. 

